Type Contact arrangement Plug-in terminal type Without LED 1 Form C 2 Form C 3 Form C 4 Form C 4 Form C 1 Form C 2 Form C 4 Form C 4 Form C 2 Form C 1 Form C DC type with surge absorbing diode Single side stable 2 Form C 3 Form C 4 Form C 4 Form C 1 Form C 2 Form C 3 Form C 4 Form C 4 Form (With operating indication) With LED PC board terminal type Without LED (With operating indication) With LED Top mounting type (TM type) Amber sealed type also available Remarks